customize

CMW does not provide any styling. Generally, themes will have some styling that will get applied to the output produced by the widget, but if you need to change it then you will have to modify your theme’s CSS accordingly. If you need to add an id or class(es) to the widget output, you can use the fields provided under the Container or Classes sub-headings in the widget admin form.
The easiest way to try out CSS styling is to use your browser’s developer tools (personally, I would recommend Firefox and its Firebug extension, but nowadays most modern desktop browsers have some sort of developer capability built-in).

thz for the answer.